Flour your worktop well and roll out the pastry to fit the size of a large baking tray. Place it carefully on the baking tray and brush all over with the vegetable oil.

Dress the pastry to 1 centimetre from the edge with your toppings, starting with the tomatoes, then moving onto the olives, basil, parma ham and mozzarella. Sprinkle the grated cheese over the top and place in the oven to bake for 20-25 minutes, until the edge of the pastry is golden brown.

Remove from the oven, cut into large slices and sprinkle with the rocket before serving.